Fire Hydrant Lines and Sprinkler Systems fire sys

High Pressure
Water Mist Systems
- Hi-Fog


Marioff was founded in 1985 with pure entrepreneurial spirit and a motivating mission: to protect people, property and business from fire, on land and at sea. The spirit lives on in a story of continuous growth, and today Marioff is a leading supplier of water mist fire protection systems.

The company's background in marine and offshore high-pressure hydraulics (hence the name, MARIne and OFFshore) led to the development of a fire protection technology which makes use of the best attributes of a truly environmentally benign agent: water. Since its launch in 1991, HI-FOG® has earned a reputation for superior fire suppression performance, and has become the standard for water mist fire protection.

Setting the Benchmark

Key to this success has been the company's extensive research and development program, which is carried out in association with leading independent authorities and fire testing laboratories. Marioff’s greatest reward is the growing list of references and the fires suppressed or extinguished by HI-FOG®, both at sea and on land. Already a trusted solution at sea, HI-FOG® is becoming increasingly important on land. With a growing number of protected installations, the range of HI-FOG®'s marine and land applications continues to expand.

A water mist system is a fire protection system which uses very fine water sprays (i.e. water mist). The small water droplets allow the water mist to control, suppress or extinguish fires by:

  • Cooling both the flame and surrounding gases by evaporation
  • Displacing oxygen by evaporation
  • Attenuating radiant heat by the small droplets themselves

The effectiveness of a water mist system in fire suppression depends on its spray characteristics, which include the droplet size distribution, flux density and spray dynamics, with respect to the fire scenario, such as the shielding of the fuel, fire size and ventilation conditions.

The use of water mist fire suppression, when compared to the use of gaseous agents and traditional sprinkler systems, has revealed advantages such as:

  • Immediate activation
  • High efficiency in the suppression of a wide variety of fires
  • Minimized water damage
  • Environmentally sound characteristics
  • No toxic problems

Marioff is renowned for pioneering high pressure water mist fire protection technology for use in passenger ferries. Today, HI-FOG® protects people, property and business continuity in a wide range of applications both on land and at sea.

Why High Pressure Water Mist?

The NFPA 750 defines three pressure regions for water mist-generating technologies: low, intermediate and high pressure systems. Marioff’s rigorous testing procedures, combined with the company’s unrivalled experience, have shown that high pressure water mist consistently delivers:

  • Better penetration into the seat of the fire
  • Superior coverage of the protected volume
  • An improved cooling effect from better mixing of gases and high evaporation rate
  • Lower overall system weight
  • Less water consumption

About Marioff

Marioff is a global leader and innovator of high pressure water mist fire protection technology. We design, develop, manufacture, install and maintain HI-FOG® solutions that enhance fire safety in buildings, industrial applications and at sea, all over the world. Marioff is a part of UTC Climate, Controls and Security, a unit of United Technologies Corporation.